9979426 has 4 divisors (see below), whose sum is σ = 14969142. Its totient is φ = 4989712.

The previous prime is 9979399. The next prime is 9979433. The reversal of 9979426 is 6249799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6249799 = 601 ⋅10399.

It can be written as a sum of positive squares in only one way, i.e., 9928801 + 50625 = 3151^2 + 225^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2494855 + ... + 2494858.

Almost surely, 2^9979426 is an apocalyptic number.

9979426 is a deficient number, since it is larger than the sum of its proper divisors (4989716).

9979426 is a wasteful number, since it uses less digits than its factorization.

9979426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4989715.

The product of its digits is 244944, while the sum is 46.

The square root of 9979426 is about 3159.0229502174. The cubic root of 9979426 is about 215.2956164284.

The spelling of 9979426 in words is "nine million, nine hundred seventy-nine thousand, four hundred twenty-six".